/Engine/Plugins/Runtime/AudioSynesthesia/Source/AudioSynesthesia/Classes/LoudnessNRT.h
Get a specific channel normalized loudness of the analyzed sound at a given time. Normalized loudness is always between 0.0 to 1.0. 0.0 refers to the noise floor while 1.0 refers to the maximum loudness in the sound.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Audio Analyzer") void GetNormalizedChannelLoudnessAtTime ( const float InSeconds, const int32 InChannel, float & OutLoudness ) const